Decontaminated VVV CMD of VVV-CL001. All sources detected within 1′ from the cluster center are shown as gray dots. Spectroscopic targets are marked as large colored points: blue, cyan, green and purple symbols are stars rejected as cluster members because they have a discrepant distance to the cluster center, mean RV, metallicity, and PMs, respectively. Red points represent spectroscopically confirmed cluster members.